3D CFD simulation of a 250 MWel oxy-fuel boiler with evaluation of heat radiation calculation

Bohnstein, Maximilian von; Richter, M.; Graeser, Philipp; Schiemann, Martin; Ströhle, Jochen; Epple, Bernd

doi:10.1016/j.rser.2020.110601

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…The effect of internal steam maldistribution on metal temperatures at low loads was investigated using the developed methodology. CFD simulation has been applied in other studies [42]. Badur et al [43] studied the lifetime of pulverized-coal boilers' water walls.…”

Section: Decarbonization Of Industrial Boiler Systemsmentioning

confidence: 99%

Evaluating Electrification of Fossil-Fuel-Fired Boilers for Decarbonization Using Discrete-Event Simulation

Chowdhury,

Gopalakrishnan,

Adhikari

et al. 2024

Energies

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Decarbonizing fossil-fuel usage is crucial in mitigating the impacts of climate change. The burning of fossil fuels in boilers during industrial process heating is one of the major sources of CO2 in the industry. Electrification is a promising solution for decarbonizing these boilers, as it enables renewable energy sources to generate electricity, which can then be used to power the electric boilers. This research develops a user-driven simulation model with realistic data and potential temperature data for a location to estimate boilers’ current energy and fuel usage and determine the equivalent electrical boiler capacity and energy usage. A simulation model is developed using the Visual Basic Application (VBA)® and takes factors such as current boiler capacity, steam temperature and pressure, condensate, makeup water, blowdown, surface area, and flue gas information as input. Random numbers generate the hourly temperature variation for a year for discrete-event Monte Carlo Simulation. The simulation generates the hourly firing factor, energy usage, fuel usage, and CO2 emissions of boilers for a whole year, and the result compares fossil-fuel and electrical boilers. The simulated data are validated using real system data, and sensitivity analysis of the model is performed by varying the input data.

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Section: Decarbonization Of Industrial Boiler Systemsmentioning

confidence: 99%

Evaluating Electrification of Fossil-Fuel-Fired Boilers for Decarbonization Using Discrete-Event Simulation

Chowdhury,

Gopalakrishnan,

Adhikari

et al. 2024

Energies

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“…34,35 The parameters of thermal radiation properties of syngas are calculated by the weighted-sum-of-gray-gases model (WSGGM). 36,37 2.2.3. Species Transport Model.…”

Section: Physical Modelmentioning

confidence: 99%

“…Compared with the DO model, the complex radiant heat transfer process in the RSC is simulated by the P-1 model for higher computational efficiency. , The parameters of thermal radiation properties of syngas are calculated by the weighted-sum-of-gray-gases model (WSGGM). , …”

Section: Model Descriptionmentioning

confidence: 99%

Numerical Simulation of the Integral Thermal Deformation Behavior of a Radiant Syngas Cooler for an Entrained-Flow Gasifier

Zhang,

Xu,

Gong

et al. 2023

Ind. Eng. Chem. Res.

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A radiant syngas cooler (RSC) is an important device in the heat recovery type of entrained-flow gasifier that can effectively improve the energy utilization efficiency. In this work, a three-dimensional (3D) industrial RSC model is established. Heat transfer characteristics and integral thermal deformation behavior are studied by numerical simulation, combining the principle of fluid–structure coupling to explore the variation of integral thermal deformation under different operating conditions. The simulation results indicate that the setting of the radiation screen has different effects on the uneven heating of the membrane wall in the circumferential direction, varying with heights. An equivalent stress concentration area in the middle and upper parts under industrial constraints is shown on the cylinder membrane wall. The equivalent stress of the upper cone membrane wall surface exceeds the allowable stress of the material. The thermal deformation of the top sealing structure and the bottom is 45.6 mm and 64.5 mm, respectively. The upward movement of the fixed support reduces the thermal deformation of the top sealing structure while increasing the thermal deformation of the bottom. An increase in the inlet temperature causes an increase in the thermal deformation of the top sealing structure and the equivalent stress at the middle and upper parts of the cylinder membrane wall while having an insignificant impact on the thermal deformation of the bottom. The deposition of ash and slag reduces the thermal deformation of the top sealing structure and the total heat transfer rate of the cylinder membrane wall. With a slight effect on the total thermal deformation, increasing the slag thickness decreases the total heat transfer rate.

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“…The traditional method for modelling solid-fuel combustion systems, such as CFPPs, is acknowledged as the Eulerian-Lagrangian (EL) approach. Successful implementations, using the EL approach include the following studies [1], [2] and [3], where the latter focused on the effect that the burner swirl direction has on the heat uptake to the furnace and superheater walls of a 620 MWe boiler.…”

Section: Introductionmentioning

confidence: 99%

Validation of a thermal non-equilibrium Eulerian-Eulerian multiphase model of a 620 MWe pulverized fuel power boiler

2021

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The use of a thermal non-equilibrium Eulerian-Eulerian model for the simulation of a 620 MWe power boiler is proposed for capturing the combustion and radiative heat transfer found in the pulverized fuel systems. The models eliminates the use of a Lagrangian reference frame in tracking solid fuel particles thereby reducing the computational expense and time. The model solves the scalar transport for the particle mass, energy and radiation interactions between the pseudo-particle and continuous phases. The goal is to apply the modelling approach to generate a simulation database for different load cases and firing conditions which in turn will be used to study flexible operation. The model is validated against both numerical and applicable site data measurements. It is shown that the model is able to adequately resolve the furnace and superheater wall heat fluxes. Additionally the resolution of the flow field, combustion dynamics and wall fluxes are demonstrated for both an 80% and 60% operational loads. Moreover, it is shown that the Eulerian-Eulerian model results in approximately a 30% computational resource reduction when compared to traditional modelling approaches.

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3D CFD simulation of a 250 MWel oxy-fuel boiler with evaluation of heat radiation calculation

Cited by 9 publications

References 23 publications

Evaluating Electrification of Fossil-Fuel-Fired Boilers for Decarbonization Using Discrete-Event Simulation

Evaluating Electrification of Fossil-Fuel-Fired Boilers for Decarbonization Using Discrete-Event Simulation

Numerical Simulation of the Integral Thermal Deformation Behavior of a Radiant Syngas Cooler for an Entrained-Flow Gasifier

Validation of a thermal non-equilibrium Eulerian-Eulerian multiphase model of a 620 MWe pulverized fuel power boiler

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